Home / 13,085.35-18,057.39-7,420.61

Finding the Fourth Proportional to 13,085.35, 18,057.39 and 7,420.61

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Solution

The fourth proportional to 13,085.35, 18,057.39 and 7,420.61 is: 10,240.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,085.35 : 18,057.39 = 7,420.61 : x
  2. Step 2: Convert to fraction form
    13,085.35/18,057.39 = 7,420.61/x
  3. Step 3: Cross multiply
    13,085.35x = 18,057.39 × 7,420.61
  4. Step 4: Simplify right side
    13,085.35x = 133,996,848.81
  5. Step 5: Solve for x
    x = 133,996,848.81/13,085.35
  6. Step 6: Final answer
    x = 10,240.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.